Home / 18,870-20,829

Finding the Third Proportional to 18,870 and 20,829

Calculator

Solution

The third proportional to 18,870 and 20,829 is: 22,991.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870 : 20,829 = 20,829 : x
  2. Step 2: Convert to fraction form
    18,870/20,829 = 20,829/x
  3. Step 3: Cross multiply
    18,870x = 20,829 × 20,829
  4. Step 4: Simplify right side
    18,870x = 433,847,241
  5. Step 5: Solve for x
    x = 433,847,241/18,870
  6. Step 6: Final answer
    x = 22,991.37

Related Problems

Find third proportional to 9,435 and 10,414.50
Half scale
Find third proportional to 37,740 and 41,658
Double scale
Find third proportional to 18,872 and 20,831
Similar ratio
Find third proportional to 28,305 and 31,243.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.